Wrigley allows you to wear all the fall colors you can afford.  With the bars and stadium being the main attractions, I recommend lots of sweaters, cardigans, and booties.  Mix and match colored jeans with cozy tops.  Wrigley is not to be overdressed whether you're watching an afternoon game or hitting the night vibes.  Keep it fun and flirty.  And remember, this neighborhood is for beer drinkers, keep that in mind when searching for an outfit!